Insulator



Dec. 3,1529.

P. J. KAYAr-r 11,733,009

INsULAToR lFiLed Jan. 10, 1928 dll Patented Dea-3, 1929 l UNITED{SITA-Tes' PATENT nimm J. nun, extremas, NEW Yonx, 'assmnoa 'ro maaien'Neon maar couronnes, or mawronx, N. Y., 'A conroamlon or nmwm-INsULAron. i

.y v Appunti@ ma :sanary 1o, 1928. semi no. 245,651'. Y

My invention relates to electrode insulators pagticularly adapted foruse with luminescent tu es.

In. the copendin a lcation of Otto B.

Ngo. I221l)1,956, filed August th, 1.927, orinsulators, a preferrediormof such insulator is disclosed.

My present invention embodies a modification and improvement of thisform of insulator wherein are found certain advantages and benefitsbeyond what said copending application shows and amongv its advantagesand benets may be mentioned great ease of inspection and repairfagreaterdegree of pro-y tection against vibration' or jarring of the electrodechamber and a better method of securing the lead-in cables orl wires andof maintaining them in self adjusting relation to said electrode. Otherand further advantages will be made clear in the following specilicationof which the drawing forms a 'part.

lln the drawings :4f l

Fig. 1 is an elevationr'andcrosssection ol the insulator and electrodestructure.

preferred formof this invention. l 3

Fig. 3 is a top plan view of Fig. 2. p

Fig. 4 is a perspective of the removable bushing.

In Fig. 1, the shell ofthe insulator is shown at 1, and the cap ofthe'insulator at 2. This cap may be attached to the shell by screwthreads as indicated. The removable bushing is at 3, through whichpasses the lead-in wire or cable, 4. Aixed to the inner face of thebushing, 3, is a connection, 5, which is held in a recess oi the bushingby a screw, 6,- or other adequate retaining means. This screw, 6, alsoserves to iorm a contact between the wire, 4, and the connectiom.Attached to the inner Fig. 2 is :1m/elevation of an insulator of a,

Y end oi the connectiom, by means of a screw,

7, or the like, is a resilient member, 8,` which I prefer to show as ahelical spring. The electrede chamber is shown at 9, and on the base ofthis chamber isa conducting element, 10, which forms a seatfor theresilient member,

` 8, and which also passes current from the resilient member to theelectrode within the chambers, 9,-the electrode and its connec tionswithin the chamber not being shown.

The shell of the insulator, 1, is attached to the apparatus by suitablemeans through holes,

11, in theiiange ofthe shell; ,thisapparatus y carrying theluminescent'tube of which 9, is

the electrode chamber. This apparatus is not l5 n shown but may be ofthe type indicated in said copendmg appllcation heretofore mentionedoil; may be of any other form recognized in ,teart.

In Figs. 2 and 3, will seen that the shell 00 of the insulator, whichmay bev of bakelite, hard rubber or other similar insulating material,has a cut, 12, which extends downwardly from the upper edge of theinsulator. .This cut, 12, is adapted to receive the removable bushing,3', shown in Figure 4. This removable bushing maybercompose'd ofmaterial similar to-that of the' shell of the insulator and has anextension, 13, projecting Vfrom the frontface ofthe bushing while to therear face is attachedl the connection, 5, with the resilient member,8,'as heretofore described. 0n the edges of this-bushing are twogrooves,

v14 and 15, which'have a width approximately' equal to the thickness ofthe shell', 1, of the in- 75 Y sulator, and this bushing is 'appliedbysliding it downwardly into'the cut, 12,'and itis'held in place by thecap, 2, after this cap `is screwed on the shell.

From the foregoing it can be seen that I '89 haveV provided a veryeffective 'structure for the reason that by removing the cap, 2, theentire assembly of thelead-in Wire or cable, the connector and theresilient member ycan be removed without iniany Way disturbing theelectrode chamber or electrode.

In addition, the resilient member, 8,pro l vides a very eiective andautomatic vadjustment between the electrode contacts and the supplyterminals and'automatically compen- 90 sates for variations in thedistance to which the electrode chamber may enter the insulator.

While I show a preferred form of my invention, it will `be evident thatother forms of resilient members may be used in place ofthe helicalspring, 8, or that connectors, other than that shown at 5, may beequally well used. Therefore, being aware that many'A changes andvariations in my invention may be made without departing from the,4spirit thereof, I desire to include all such changes and variationswithin the scopev of my claims.

I claim v 'y 1. In a device -of the kind described, the combination witha shell and a cap, of a removable bushing slidably mounted on the wallof said shell and held against movement by said cap. i I

2. In a device of the kind described, a slidably removable bushinghaving grooved edges, said bushing having` an opening` adapted toreceive a wire or cable and means affixed to a face of the bushing andarranged to engage the wire or cable, said means carrying a resilientmember at one extremity.

3. In a device of thekind described, an insulator having an electrodetherein, a removable bushing slidably mounted on the shell of theinsulator and retained bv the insulator cap, a connector aiixed to theinner face of the bushing and adapted to engage a wire entering throughthe bushing, a resilient ymember fixed to said connector and coactingbetween the connector and said,elec trode.

4. Ina device of the kinddescribed, an electrode, a shell member, a capmember and a bushing carrying a connection with an eX- ternal source ofcurrent, said bushing being` slidably mounted on the wall of said shelland having means adapted and arranged resiliently to contact with theelectrode terminal and to transmit current thereto from said externalsource.

5. In a device of the kind described, an electrode within` an insulator,a slidably mounted bushing carrying a connection with an external sourceof current and mounted on the wall of said insulator and means actingbetween said electrode and said bushing resiliently to contact with saidelectrode terminal and to transmit current thereto from a source ofcurrent.

In witness whereof, I have hereunto sub- I scribed my name on this the5th day of December, 1927.

PIIILLIP J. KAYATT.

